1、毕毕 业业 设设 计（论文）计（论文） PLC 交通灯毕业论文交通灯毕业论文 摘摘 要要 随着城市机动车量的不断增加，自 80 年代后期,许多大城市如北京、上 海、南京等出现了交通超负荷运行的情况。传统的交通信号灯控制一般采用 电子线路和继电器实现，结构复杂，可靠性低，故障率高,较难实现功能的变 更。而可编程控制器(PLC)以微处理器为核心，具有可靠性高，控制功能强， 使用灵活方便等优点。特别是由 PLC 实现的控制系统，普遍采用依据继电接 触器控制系统电气原理图编制的梯形图语言进行程序设计，结构简单，抗干 扰能力强，运行稳定可靠，可方便地设置定时时问，编程容易，功能扩展方 便，修改灵活等，并
2、且有完善的自诊断和显示功能，维修工作极为简单。本 文就是基于可变成控制通过调试完成对交通信号灯的控制设计。 关键词关键词：可编程控制器；交通灯；设计； Abstract With the increasing amount of urban automobiles, since the 80 s, many big cities such as Beijing, Shanghai, nanjing and other appeared traffic overload running. The traditional traffic light control general use of t
3、he electronic circuits and relay to realize the complex structure, reliability, low failure rate high, are difficult to achieve the change of function. And programmable controller (PLC) to microprocessor as the core, with high reliability, control function is strong, flexible and convenient use, etc
4、. Especially the PLC control system, the widespread use of the relay contact device control system based on electrical diagram of ladder diagram language program design, simple structure, strong anti-jamming capability, stable operation, can easily set timing of time, programming easy, function expansion is convenient, modify, and have a perfect flexible the diagnosis and display function, repair work is extremely simple. This paper is based on can be turned into control through the commissionin
